中国科学院近代物理研究所从历次的大科学装置建设中,积累了大型真空腔体、超高/极高真空系统以及强流重离子加速器真空系统等设计经验。为了获得超高/极高真空系,从真空设备选择、材料处理、密封形式以及在线烘烤等方面形成了一套完整...中国科学院近代物理研究所从历次的大科学装置建设中,积累了大型真空腔体、超高/极高真空系统以及强流重离子加速器真空系统等设计经验。为了获得超高/极高真空系,从真空设备选择、材料处理、密封形式以及在线烘烤等方面形成了一套完整的工艺流程;在强流重离子加速器(High Intensity Heavy ion Accelerator Facility,HIAF)真空系统研制过程中,为了减小磁铁气隙尺寸,大幅度降低磁铁造价及电源运维成本,提出陶瓷内衬薄壁真空室新方法,并研制了原理性样机;为了有效控制HIAF未来运行过程中的动态真空效应,设计了束流准直器,开展了真空材料解吸率测量研究;为了解决高放射性区域真空系统的维护问题,提出了自重密封结构,同时研制了充气膨胀密封法兰;为了进一步优化高精度环形谱仪真空度,开展低温极高真空系统研究。展开更多
There is a definite requirement of high vacuum degree in synchrotron accelerator. According to a study[1], the static LEAR vacuum pressure was about 510?12 Torr, but local pressure bumps up to 10?9 Torr occurred duri...There is a definite requirement of high vacuum degree in synchrotron accelerator. According to a study[1], the static LEAR vacuum pressure was about 510?12 Torr, but local pressure bumps up to 10?9 Torr occurred during continuous injection of about 108 ions/s. A dynamic pressure increase was attributed to the outgassing of vacuum equipment due to the impact of lost ions. The ion-induced desorption can seriously limit the ion intensity, luminosity, and beam lifetime of the accelerator.展开更多
The CP combined NEG pump (Capaci Torr D400) with SIP (SP-400) is possible to be used in compact acceleratorfacilities operating in HV condition, so the pumping characteristics of CP in HV condition have been measured....The CP combined NEG pump (Capaci Torr D400) with SIP (SP-400) is possible to be used in compact acceleratorfacilities operating in HV condition, so the pumping characteristics of CP in HV condition have been measured.The pumping speed measurement apparatus is shown in Fig. 1 and the measurement procedures are introduced asfollows:(1) Leak detect for the measurement apparatus, then bake out at 140 ?C for 4 h. The bake-out temperature isincreased 30 ?C per one hour.(2) Start the ion pump, at the same time, bake out the testing chamber at 180 ?C for 10 h continuously. Theion pump would work normally after degassing for 30 min.展开更多
文摘中国科学院近代物理研究所从历次的大科学装置建设中,积累了大型真空腔体、超高/极高真空系统以及强流重离子加速器真空系统等设计经验。为了获得超高/极高真空系,从真空设备选择、材料处理、密封形式以及在线烘烤等方面形成了一套完整的工艺流程;在强流重离子加速器(High Intensity Heavy ion Accelerator Facility,HIAF)真空系统研制过程中,为了减小磁铁气隙尺寸,大幅度降低磁铁造价及电源运维成本,提出陶瓷内衬薄壁真空室新方法,并研制了原理性样机;为了有效控制HIAF未来运行过程中的动态真空效应,设计了束流准直器,开展了真空材料解吸率测量研究;为了解决高放射性区域真空系统的维护问题,提出了自重密封结构,同时研制了充气膨胀密封法兰;为了进一步优化高精度环形谱仪真空度,开展低温极高真空系统研究。
文摘There is a definite requirement of high vacuum degree in synchrotron accelerator. According to a study[1], the static LEAR vacuum pressure was about 510?12 Torr, but local pressure bumps up to 10?9 Torr occurred during continuous injection of about 108 ions/s. A dynamic pressure increase was attributed to the outgassing of vacuum equipment due to the impact of lost ions. The ion-induced desorption can seriously limit the ion intensity, luminosity, and beam lifetime of the accelerator.
文摘The CP combined NEG pump (Capaci Torr D400) with SIP (SP-400) is possible to be used in compact acceleratorfacilities operating in HV condition, so the pumping characteristics of CP in HV condition have been measured.The pumping speed measurement apparatus is shown in Fig. 1 and the measurement procedures are introduced asfollows:(1) Leak detect for the measurement apparatus, then bake out at 140 ?C for 4 h. The bake-out temperature isincreased 30 ?C per one hour.(2) Start the ion pump, at the same time, bake out the testing chamber at 180 ?C for 10 h continuously. Theion pump would work normally after degassing for 30 min.
